CN217770159U - Broadcast terminal equipment and audio broadcasting system - Google Patents

Abstract

The utility model provides a broadcast terminal equipment and audio broadcasting system relates to audio frequency processing technology field, and this audio player can eliminate the echo to the audio frequency of gathering and handle to realize broadcast terminal equipment's the function of talkbacking. The broadcast terminal equipment is used for communicating with the broadcast host equipment and comprises an audio playing component, an audio collecting component, a communication component and a control component; the audio playing component is electrically connected with the communication component, and the audio acquisition component and the communication component are respectively electrically connected with the control component; the communication component is used for receiving a first audio signal sent by the broadcast host equipment and sending a second audio signal to the broadcast host equipment, wherein the second audio signal is an audio signal input by a user; the audio playing component is used for playing a first audio signal; the audio acquisition component is used for acquiring a third audio signal of the broadcast terminal device on the placement site; the control component is used for carrying out echo cancellation processing on the third audio signal to obtain a second audio signal.

Description

Broadcast terminal equipment and audio broadcasting system

Technical Field

The application relates to the technical field of audio playing, in particular to a broadcast terminal device and an audio broadcasting system.

Background

With the rapid development of wireless communication technology, network speakers/frets are also entering the market as one of the products of digital communication technology. The network speaker/sound column refers to a broadcast terminal device that transmits based on a network, and can convert a digital signal into an audio signal by using a digital network such as a local area network, an ethernet network, a wide area network, and the like. At present, network speakers/sound columns have been gradually popularized, for example, suspended network speakers installed in classrooms of schools, and the like.

Currently, network speakers/frets are used only to play audio. In some scenarios where it is necessary to implement the intercom via the network speaker/sound post and the broadcasting host device, for example, the intercom between a disease control center and an isolation ward, the intercom between security personnel or visitors at a cell gate and a cell resident, etc., the existing network speaker/sound post cannot satisfy the above intercom requirement.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a broadcasting terminal device and an audio broadcasting system, wherein an audio player can perform echo cancellation processing on collected audio so as to realize the talkback function of the broadcasting terminal device.

In a first aspect, an embodiment of the present application provides a broadcast terminal device, where the broadcast terminal device is used for communicating with a broadcast host device, and the broadcast terminal device includes an audio playing component, an audio collecting component, a communication component, and a control component; the audio playing component is electrically connected with the communication component, and the audio acquisition component and the communication component are respectively electrically connected with the control component; the communication component is used for receiving a first audio signal sent by the broadcast host equipment and sending a second audio signal to the broadcast host equipment, wherein the second audio signal is an audio signal input by a user; the audio playing component is used for playing a first audio signal; the audio acquisition component is used for acquiring a third audio signal of the broadcast terminal device, wherein the third audio signal comprises a first audio signal and a second audio signal; the control component is used for carrying out echo cancellation processing on the third audio signal to obtain a second audio signal.

Based on the broadcast terminal equipment provided by the application, at least the following beneficial effects can be generated: through the echo eliminating technology, the audio played by the user in the audio collected on site can be eliminated when the audio message is sent to the broadcasting host equipment, so that echo elimination is realized, a user can normally talk with the broadcasting host equipment through the broadcasting terminal equipment, and the use experience of the user is improved.

In a possible implementation manner, the audio acquisition component in the broadcast terminal device includes a microphone.

In another possible implementation manner, the audio acquisition component in the broadcast terminal device includes multiple microphones, and the multiple microphones are disposed at different positions of the broadcast terminal device.

It should be noted that, if the broadcast terminal device includes a plurality of microphones, the plurality of microphones may be disposed in a plurality of directions and a plurality of positions of the broadcast terminal device, so that when the position of the user is far away from the audio capturing device, one microphone of the device may clearly capture the audio input by the user, thereby increasing the range of the device capable of capturing the audio.

In another possible implementation, the audio playing component includes a broadcast speaker and/or an intercom speaker.

In another possible implementation manner, the broadcast terminal device further includes a two-wire interface.

It should be noted that the two-wire interface is arranged, so that the broadcast terminal device can adopt a two-wire transmission mode, that is, power supply and network supply are performed through two lines. Therefore, when the broadcasting terminal equipment is installed and used, specific power supply lines and broadband lines do not need to be rearranged, the interface is convenient to use the existing line environment to meet the power supply and network supply requirements of the broadcasting terminal equipment, the installation is convenient, and excessive energy consumption is not needed.

In yet another possible implementation manner, the broadcast terminal device further includes one or more of a 24v dc power supply interface, a 220v ac power supply interface, a solar power supply interface, a standard active ethernet POE interface, a wireless communication Wi-Fi interface, a standard socket RJ45 interface, and a fourth generation mobile communication 4G/fifth generation mobile communication 5G interface.

It should be noted that, in this implementation manner, the broadcast terminal device may be provided with multiple types of power supply and network supply interfaces, so that in different use environments, power supply and network supply may be implemented by using different interfaces in the broadcast terminal device, for example, when the environment is severe and it is inconvenient to deploy a power supply circuit, power supply may be implemented by using a solar power supply interface.

In a further possible implementation manner, the broadcast terminal device further includes a bluetooth interface and/or a 3.5 mm input interface.

In yet another possible implementation manner, the broadcasting terminal device further includes a solar panel disposed on a housing of the broadcasting terminal device, and the solar panel is electrically connected to the solar power supply interface. Therefore, when the power supply environment is poor, solar energy can be utilized so as to widen the service environment of the broadcasting terminal equipment.

In a second aspect, the present application further provides an audio broadcasting system, which includes a broadcasting host device and one or more of the broadcasting terminal devices provided in the first aspect.

Drawings

Fig. 1 is a schematic structural diagram of an audio broadcasting system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a broadcast terminal device according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another component of the broadcast terminal device according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a broadcast terminal device according to an embodiment of the present application.

Reference numerals are as follows: 100-broadcast terminal equipment; 200-a broadcast host device; 10-an audio playing component; 11-a broadcast speaker; 12-a speakerphone; 20-an audio acquisition component; 21-a microphone; 22-a microphone; 23-a bluetooth interface; 24-3.5 mm input interface; 30-a communication component; 31-two-wire interface; 32-standard POE interface; a 33-Wi-Fi interface; 34-RJ45 interface; a 35-4G/5G network interface; 40-a control assembly; 50-a camera assembly; a 61-24V direct current power supply interface; a 62-220V power supply interface; 63-solar power supply interface.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings; this is done solely for the convenience of describing the application and for simplicity of description and is not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation and, thus, should not be taken as limiting the application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; the specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As described in the background, existing broadcast terminal devices (such as network speakers, network sound pillars, etc.) usually only have a broadcast sounding function, but not an intercom function. Wherein, the broadcast sounding function specifically means: the broadcasting host device (also called a broadcasting platform or a broadcasting center end) outputs audio to the broadcasting terminal device in a unidirectional way. The talkback function means: the broadcasting host equipment and the broadcasting terminal equipment perform bidirectional audio signal transmission, namely the broadcasting host equipment can transmit audio signals to the broadcasting terminal equipment, and the broadcasting terminal equipment can also transmit the audio signals to the broadcasting host equipment, so that voice talkback can be realized between users at the broadcasting terminal equipment and users at the broadcasting terminal equipment. Because the audio output power of the broadcast terminal device is often large, when the broadcast terminal device records the speech audio of the user to implement the talk-back function, the volume of the audio output by the broadcast terminal device may be much larger than the volume of the user speech collected by the microphone of the broadcast terminal device. Therefore, when the broadcasting terminal equipment talkbacks with the broadcasting host machine equipment, the broadcasting terminal equipment may send the collected audio frequency of the user speaking and the audio frequency played by the broadcasting terminal equipment to the broadcasting host machine equipment, so that an echo phenomenon can be generated in the talkback process, and the talkback of the broadcasting terminal equipment and the broadcasting host machine equipment cannot be realized.

In order to solve the above problems, in a solution provided in the prior art, an intercom device is provided at a broadcast terminal side, and the intercom device and the broadcast host device can transmit audio signals to each other, so as to meet intercom requirements of users. However, each broadcasting terminal side needs to be provided with one intercom device, which is high in cost.

In view of this, an embodiment of the present application provides a broadcast terminal device, which may perform echo cancellation processing on a collected field audio, so that the broadcast terminal device may implement talkback with a broadcast host device.

As shown in fig. 1, an embodiment of the present application provides an audio broadcasting system including the above-described broadcasting terminal device. The system includes one or more broadcast terminal apparatuses 100 and a broadcast host apparatus 200. The broadcast terminal apparatus 100 and the broadcast host apparatus 200 may be connected by wire or wirelessly. It should be understood that the wireless connection is, for example, a wireless communication technology (Wi-Fi) connection or the like; the wired connection is, for example, an optical fiber connection, and the like, and is not limited thereto.

The broadcast host device 200 is a control center of the audio broadcasting system, and the broadcast host device 200 can manage the entire broadcasting system in real time. For example, when the broadcast host device 200 is a broadcast initiator, the broadcast host device 200 may transmit an audio signal to the broadcast terminal device 100 (i.e., a broadcast receiver) through a communication connection between the broadcast host device 200 and the audio playing device 100, so that the broadcast terminal device 100 may broadcast the received audio signal to a user.

In practical use, the broadcast terminal apparatus 100 may be installed in an area where it is necessary to receive an audio signal broadcast by the broadcast host apparatus 200, and play the received audio signal to a user located in the area. For example, when the broadcast host apparatus 200 is a broadcast host apparatus of a school, the broadcast terminal apparatus 100 may be installed in each classroom of the school, and the broadcast terminal apparatus 100 installed in each classroom may play audio signals such as notification information, a ring tone for getting on and off the school, and the like, received from the broadcast host apparatus 200 to teachers and students. For another example, when the broadcast host apparatus 200 is a broadcast host apparatus of a hospital nurses' station, the broadcast terminal apparatus 100 may be installed in each ward, and the broadcast terminal apparatus 100 installed in each ward may play audio signals such as an instant notice, a soothing music, etc. received from the broadcast host apparatus 200.

Further, when the broadcast host apparatus 200 controls the broadcast terminal apparatuses 100 to implement the sound emission function, the broadcast host apparatus 200 may control each broadcast terminal apparatus 100 to play different contents. Specifically, the broadcast host apparatus 200 may perform the partition broadcast according to the installation location of each broadcast terminal apparatus 100. For example, when the audio broadcasting system is a digital network system, the broadcasting host device 200 may transmit different audio signals to the broadcasting terminal devices 100 at different locations according to the network IP address of each broadcasting terminal device 100, so that the broadcasting terminal devices 100 at different locations play different contents. For example, in the broadcasting system inside a factory, a user may control the broadcasting host device 200 installed in the broadcasting control room to play back information such as operation skills, product knowledge, etc. installed in different production workshops.

Fig. 2 is a schematic composition diagram of a broadcast terminal device 100 according to an embodiment of the present application. The broadcast terminal device 100 includes an audio playing component 10, an audio capturing component 20, a communication component 30 and a control component 40. The audio playing component 10 is electrically connected to the communication component 30, and the audio collecting component 20 and the communication component 30 are electrically connected to the control component 40, respectively.

The audio playing component 10 may be configured to receive audio information broadcast by the broadcast host device 100 in the audio broadcasting system, and convert the received audio signal from an electrical signal into a sound signal to play the broadcast terminal device. The audio playback assembly 10 may be any transducer device capable of converting an electrical signal into an acoustic signal, for example, according to the transduction principle, the transducer device may be an electrodynamic (i.e. moving coil) speaker, an electrostatic (i.e. capacitive) speaker, an electromagnetic (i.e. reed) speaker, a piezoelectric (i.e. crystal) speaker, etc., or the transducer device may be a low frequency speaker, a mid frequency speaker, a high frequency speaker, etc. according to the frequency range of application. In addition, the audio playing component 10 may also be a combined speaker including the above-mentioned various types of speakers, which is not limited thereto.

Optionally, as shown in fig. 2, the audio playing component 10 may also be electrically connected to the control component 30. For playing the audio signal after processing by the control component 10.

Optionally, the audio playing component 10 may be a broadcast speaker and/or an intercom speaker, depending on the particular implementation.

For example, when the broadcast terminal device 100 implements the broadcast sound generating function, the broadcast terminal device 100 may play audio information using a broadcast speaker, and when the broadcast terminal device 100 implements the intercom function, the broadcast terminal device 100 may play audio using an intercom speaker.

The audio collecting module 20 is used for collecting the audio signal of the placement site of the above-described broadcast terminal device 100. In general, the audio capture component 20 may capture an audio signal input by a user to the broadcast terminal device 100, and may also capture an audio signal played by the broadcast terminal device 100 itself.

Optionally, the audio acquisition assembly 20 includes one or more microphones. Illustratively, as shown in fig. 3, the audio broadcasting component 20 includes a microphone 21 and a microphone 22. In practical use, the microphones 21 and 22 may be disposed at different positions and different directions of the placement site of the broadcast terminal device, so as to improve the range of the broadcast terminal device 100 for capturing audio.

Optionally, the audio capturing assembly 20 may further include an external audio input device. As shown in fig. 3, the broadcast terminal apparatus 100 includes a bluetooth interface 23 and a 3.5 mm input interface 24 to connect an external audio input device.

The communication component 30 may be used to enable communication between the broadcast terminal device 100 and the broadcast host device 200. The communication component 30 may be a module, a circuit, a transceiver, or any device capable of enabling communication. In the above-described audio broadcasting system, the broadcasting terminal device 100 may receive the audio signal broadcasted by the broadcasting host device 200 through the communication component 30 and play the received audio signal.

The control component 40 may be a Central Processing Unit (CPU), a general purpose processor Network (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof.

Optionally, in the audio broadcasting system, the session flow between the broadcast terminal device 100 and the broadcast host device 200 may be initiated by the broadcast host device 200, or may be initiated by the broadcast terminal device 100.

In one possible implementation manner, the broadcast host device 200 may send an intercom instruction to any broadcast terminal device 100 in the audio broadcast system to instruct the broadcast terminal device 100 to enter an intercom flow. For example, when a cell service person needs to communicate with a resident of the cell, the broadcast host apparatus 200 may communicate with the broadcast terminal apparatus 100 in the home of the resident.

Optionally, the talkback process may be specifically implemented as the following steps:

s11, the broadcast host apparatus 200 transmits an intercom instruction to the broadcast terminal apparatus 100. Wherein the talk-back instruction may include broadcasting a first audio signal input by a user at the side of the host device 200.

Alternatively, the user at the broadcast host device 200 side may select the broadcast terminal device 100 that needs to talk back, and the broadcast host device 200 further sends a talk back instruction to the broadcast terminal device 100 according to the identifier of the broadcast terminal device 100, for example, the IP address.

S12, the broadcast terminal device 100 receives and plays the first audio signal.

For example, the broadcast terminal device 100 receives the talk-back instruction through the communication component 100 and instructs the audio playing component 10 to play the first audio signal.

S13, the broadcast terminal device 100 acquires a third audio signal including a second audio signal, where the second audio signal is an audio signal input by a user at the side of the broadcast terminal device 100. The third audio signal includes the first audio signal and the second audio signal.

Specifically, the control component 40 in the broadcast terminal device 100 controls the audio acquisition component 20 to acquire the third audio signal of the placement site of the broadcast terminal device 100 according to the talkback instruction. And carrying out echo cancellation processing on the collected third audio signal to obtain a second audio signal.

Specifically, the control component 40 may compare the third audio signal with the first audio signal, and remove a portion of the third audio signal matching the first audio signal, so as to obtain the second audio signal input by the user at the broadcasting terminal device 100 side.

S14, the broadcast terminal apparatus 100 transmits the second audio signal to the broadcast host apparatus 200.

For example, the control component 40 in the broadcast terminal apparatus 100 controls the communication component 30 to transmit the second audio signal to the broadcast host apparatus 200.

S15, the broadcast host device 200 receives and plays the second audio signal.

In another possible implementation manner, any one of the broadcast terminal apparatuses 100 in the audio broadcasting system described above may send a dialog request to the broadcast host apparatus 200 to instruct the broadcast host apparatus 200 to enter the talk-back procedure. For example, when an emergency occurs and a help is required, the broadcast terminal device 100 and the host 200 are turned off to perform a talk-back operation.

Optionally, the talkback process may be specifically implemented as the following steps:

s21, the broadcast terminal apparatus 100 transmits the talk-back request to the broadcast host apparatus 200.

Specifically, the audio capture component 20 of the broadcast terminal device 100 may instruct the control component 40 to initiate a talk-back procedure when a preset keyword is identified in the audio input by the user. Accordingly, the control component 40 controls the communication component 30 to transmit the dialogue request to the broadcast host device 200.

The preset keywords may include "call host" and other similar keywords. Also, the talk-back request may include a fourth audio signal for acquiring the broadcast terminal apparatus 100 and an identifier of the broadcast terminal apparatus 100.

S22, the broadcast host 200 may collect a fifth audio signal input by the user at the broadcast host 200 side according to the talk request.

The broadcast host device 200 may determine the installation location of the broadcast terminal device 100 according to the identifier of the broadcast terminal device 100, and connect with the device to implement the intercom function.

S23, the broadcast host apparatus 200 sends a fifth audio signal to the broadcast terminal apparatus 100;

s24, the broadcast terminal device 100 receives and plays the fifth audio signal, and collects a sixth audio signal of the location of the broadcast terminal device 100.

The sixth audio includes the fifth audio signal and a seventh audio signal input by the user on the broadcast terminal apparatus 100 side. The broadcast terminal device 100 performs echo cancellation processing on the sixth audio signal to obtain a seventh audio signal.

Then, the broadcast terminal apparatus 100 may transmit the seventh audio signal to the broadcast host apparatus 200.

Optionally, as shown in fig. 3, the broadcast terminal device 100 may further include a photographing component 50. Illustratively, the camera assembly 50 may be a rotatable camera. In this way, in the above-mentioned intercom process, the broadcasting terminal device 100 can also shoot images and video information of the place through the shooting component 50, and send the images and video information to the broadcasting host device 200, so that the user at the broadcasting host device 200 can know the specific situation and the specific requirements of the user at the broadcasting terminal device 100 more clearly.

Based on the broadcast terminal equipment provided by the application, at least the following beneficial effects can be generated: through the echo eliminating technology, the audio played by the user in the audio collected on site can be eliminated when the audio message is sent to the broadcasting host equipment, so that echo elimination is realized, a user can normally talk with the broadcasting host equipment through the broadcasting terminal equipment, and the use experience of the user is improved.

In some embodiments, as shown in fig. 3, the broadcast terminal device 100 further includes a two-wire interface 31.

It should be noted that the two-wire interface 31 is arranged to enable the broadcast terminal device to adopt a two-wire transmission mode, that is, a mode of supplying power and network through two wires. Therefore, when the broadcasting terminal equipment is installed and used, specific power supply lines and broadband lines do not need to be rearranged, the interface is convenient for meeting the power supply and network supply requirements of the broadcasting terminal equipment by utilizing the existing line environment, the installation is convenient, and excessive energy sources do not need to be consumed.

Optionally, as shown in fig. 3, the broadcast terminal device 100 further includes a 24v dc power supply interface 61, a 220v ac power supply interface 62, a solar power supply interface 63, a standard active ethernet (POE) interface 32, a Wi-Fi interface 33, and a standard jack (registered jack45, RJ 45) interface 34.

The communication component 30 may include one or more of a two-wire interface 31, a standard POE interface 32, a Wi-Fi interface 33, and an RJ45 interface 34.

It should be noted that, in this implementation manner, the broadcast terminal device may be provided with multiple types of interfaces for power supply and network supply, so that in different usage environments, different interfaces in the broadcast terminal device may be used to implement power supply and network supply.

The 24v dc power supply interface 61 may be connected to a dc power supply such as a dry battery, a storage battery, and a dc generator. And, 220 volts is the most common effective value of standard voltage of the resident of our country, thus 220 volts of power supply interface 62 can be suitable for can carry on the installation of the conventional power supply and change.

For example, when the installation environment of the broadcast terminal device 100 is good, the broadcast terminal device 100 may use a conventional power supply network, for example, the broadcast terminal device 100 is powered by a 24v dc power supply interface 61 or a 220v power supply interface 62, and the RJ45 interface 34 or the Wi-Fi interface 33 is used to implement the network supply of the broadcast terminal device 100.

In addition, POE (power over ethernet) power supply of the broadcast terminal device 100 can be realized through the standard POE interface 32. POE, also known as Power Over Lan (POL) or Active Ethernet (sometimes referred to simply as power over Ethernet), refers to the latest standard specification for simultaneous transmission of data and electrical power using existing standard Ethernet transmission cables, which also maintains compatibility with existing Ethernet systems and users.

For example, when the user needs to set the power supply and network supply lines of the broadcast terminal device 100 together, the power supply and network supply of the broadcast terminal device 100 may be implemented through the standard POE interface 32 or the two-wire interface 31.

In addition, when the user needs to unify the power supply and network supply lines of the broadcasting terminal device 100 and the installation environment is not favorable for setting a new line, and needs to utilize the original line, the power supply and network supply of the broadcasting terminal device 100 can be realized through the two-wire system interface 31.

Optionally, the broadcast terminal device 100 further includes a solar panel disposed on the housing of the broadcast terminal device. Therefore, when the environment is severe and a power supply circuit is inconvenient to deploy, the solar power supply interface 63 can be adopted to supply power.

Illustratively, the housing of the audio playback device 100 may be formed by a solar panel. Therefore, the solar panel can be used for generating and storing electricity so as to meet the use requirement in the field environment inconvenient for power supply. Exemplarily, as shown in fig. 4, taking the audio playing device 100 as a cuboid as an example, except for the bottom surface a which is not easily illuminated, the shells of the other 5 surfaces of the cuboid can be designed as a solar panel, so that the contact area between the solar panel and the light source is larger, and then the photoelectric conversion can be continued at different time points, and the electric quantity can be generated more quickly.

Optionally, as shown in fig. 3, the broadcast terminal device 100 further includes a fourth generation mobile communication (4 th generation mobile communication technology,4 g)/fifth generation mobile communication (5 th generation mobile communication technology,5 g) network interface 35.

Thus, when the environment is severe and the power supply network line is not convenient to deploy, the 4G/5G network interface 35 can be adopted to realize the power supply network.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present application.

Claims (9)

1. The broadcast terminal equipment is characterized by being used for communicating with broadcast host equipment and comprising an audio playing component, an audio collecting component, a communication component and a control component; the audio playing component is electrically connected with the communication component, and the audio acquisition component and the communication component are respectively electrically connected with the control component;

the communication component is used for receiving a first audio signal sent by a broadcast host device and sending a second audio signal to the broadcast host device, wherein the second audio signal is an audio signal input by a user;

the audio playing component is used for playing the first audio signal;

the audio acquisition component is used for acquiring a third audio signal of the broadcast terminal device, wherein the third audio signal comprises the first audio signal and the second audio signal;

the control component is used for carrying out echo cancellation processing on the third audio signal so as to obtain the second audio signal.

2. The broadcast terminal apparatus of claim 1, wherein the audio capture component comprises a microphone.

3. The broadcast terminal device of claim 1, wherein the audio capture component comprises a plurality of microphones disposed at different locations of the broadcast terminal device.

4. The broadcast terminal device of claim 1, wherein the audio playback component comprises a broadcast speaker and/or an intercom speaker.

5. The broadcast terminal device according to any of claims 1 to 4, characterized in that the broadcast terminal device further comprises a two-wire interface.

6. The broadcast terminal device according to any of claims 1 to 4, wherein the broadcast terminal device further comprises one or more of a 24 volt DC power supply interface, a 220 volt AC power supply interface, a solar power supply interface, a standard active Ethernet POE interface, a wireless communication Wi-Fi interface, a standard jack RJ45 interface, and a fourth generation mobile communication 4G/fifth generation mobile communication 5G interface.

7. The broadcast terminal device according to any of claims 1 to 4, characterized in that the broadcast terminal device further comprises a Bluetooth interface and/or a 3.5 mm input interface.

8. The broadcast terminal device of claim 6, further comprising a solar panel disposed on the housing of the broadcast terminal device, the solar panel being electrically connected to the solar power interface.

9. An audio broadcasting system, characterized in that the system comprises a broadcasting host device and one or more broadcasting terminal devices of any one of the preceding claims 1 to 8, the broadcasting terminal devices being connected to the broadcasting host device by wire or wirelessly.

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